html {
  font-size: 100px;
}
html,
body,
#app {
  height: 100%;
  overflow: hidden;
}
#app {
  position: relative;
  margin: 0 auto;
  max-width: 750px;
}
/* 遮罩层 */
.bg_img,
.bg_mark {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.bg_img {
  z-index: -2;
  background: url('../images/music_bg.png') no-repeat;
  background-size: cover;
  filter: blur(7px);
  width: 110%;
  height: 110%;
  top: -0.2rem;
  left: -0.2rem;
}
.bg_mark {
  z-index: -1;
  background: rgba(0, 0, 0, 0.5);
}
.header_box,
.main_box,
.footer_box {
  box-sizing: border-box;
  overflow: hidden;
}
/* 头部 */
.header_box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.3rem;
  height: 19vh;
}
.header_box .info {
  display: flex;
}
.header_box .info .cover {
  width: 1.4rem;
  height: 1.4rem;
}
.header_box .info .title,
.header_box .info .author {
  max-width: 4.6rem;
  height: 0.7rem;
  line-height: 0.7rem;
  color: #FFF;
  font-weight: bold;
  font-size: 0.46rem;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.header_box .info .author {
  font-size: 0.3rem;
}
.header_box .music_btn {
  opacity: 0;
  transition: opacity 0.3s;
  width: 0.7rem;
  height: 0.7rem;
  background: url('../images/music.svg') no-repeat;
  background-size: 100% 100%;
}
.header_box .music_btn.move {
  animation: musicMove 1s linear 0s infinite both;
}
@keyframes musicMove {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
/* 主体 */
.main_box {
  position: relative;
  padding: 0 0.2rem;
  height: 65vh;
}
.main_box .wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transition: top 0.2s;
}
.main_box .wrapper p {
  height: 1rem;
  line-height: 1rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.3rem;
}
.main_box .wrapper p.active {
  color: #31C27C;
  transition: color 0.3s;
}
/* 尾部 */
.footer_box {
  padding: 0 0.2rem;
  height: 16vh;
}
.footer_box .download {
  display: block;
  margin: 0 auto;
  width: 60%;
  height: 1rem;
  line-height: 1rem;
  text-align: center;
  text-indent: 0.4rem;
  border-radius: 0.5rem;
  color: #FFF;
  font-size: 0.36rem;
  background: url('../images/sprite_play.png') no-repeat #31C27C;
  background-size: 0.8rem 7rem;
  background-position: 0.2rem -5.83rem;
}
.footer_box .download:active {
  background-color: #279962;
}
.footer_box .progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 0.92rem;
}
.footer_box .progress .cur_time,
.footer_box .progress .total_time {
  width: 1rem;
  line-height: 0.92rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.24rem;
}
.footer_box .progress .prog_bg {
  position: relative;
  width: 100%;
  height: 0.04rem;
  background: rgba(255, 255, 255, 0.5);
}
.footer_box .progress .prog_bg .prog_cur {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: #31C27C;
}
.myAudio {
  display: none;
}
